A) 5/8 × 4/15 = (5 × 4)/(8 × 15) = 20/120 = 1/6
Б) 17 × 9/34 = 17 × 9 / 34 = 153 / 34
В) 64/125 × 15/16 = (64 × 15) / (125 × 16) = 960 / 2000 = 24 / 50 = 12 / 25
Г) 6 1/9 × 1 2/7 = (6 + 1/9) × (1 + 2/7) = (54/9 + 1/9) × (7/7 + 2/7) = (55/9) × (9/7) = 55/7 = 7 6/7
A) 5/8 × 4/15 = (5 × 4)/(8 × 15) = 20/120 = 1/6
Б) 17 × 9/34 = 17 × 9 / 34 = 153 / 34
В) 64/125 × 15/16 = (64 × 15) / (125 × 16) = 960 / 2000 = 24 / 50 = 12 / 25
Г) 6 1/9 × 1 2/7 = (6 + 1/9) × (1 + 2/7) = (54/9 + 1/9) × (7/7 + 2/7) = (55/9) × (9/7) = 55/7 = 7 6/7